Below is a collection of spatial datasets used in this project.

King County Boundary

King County Subdivision Boundary

Seattle Boundary

Tracts in King County

Although this assessment is primarily focused on three communities within the Seattle CCD subdivision of King County, one of the indicators (housing market conditions) uses neighboring tracts to determine displacement risk. Some of the neighboring tracts are part of other county subdivision, but rather than targeting just those specific tracts, this method collects data for all King County tracts and then runs the analysis on the appropriate subsets.

In the absence of a straight-forward method for identifying all the census tracts in the Seattle CCD subdivision of King County, it is possible to extract this information from American Factfinder. This tutorial describes how to use the American Factfinder interface to extract a list of all “all tracts within (or partially within) a census place”; substituting “county subdivision” for “place” will retrieve the desired results.

Tract boundaries sometimes change over time, particularly on years when the decennial census is conducted. While this project will primarily use the current set of boundaries, it is necessary to collect the tract boundaries of the 2000-2009 time period so that these datasets can be visually represented in choropleth diagrams.

King County Waterbodies

These are useful for “clipping” census geographies whose boundaries extend into waterbodies.

although coordinates are longitude/latitude, it is assumed that they are planar
although coordinates are longitude/latitude, it is assumed that they are planar

Census Geometries Without (Western) Waterbodies

The same four types of cenus geometries shown above (King County, Seattle CCD, City of Seattle, and all King county tracts) with the major waterbodies removed.

Mixed Census Geometries Simple Feature Object

Add a brief explanation of the sf package